CN101883455A - Lighting power-saving measurement and control system based on wireless sensor network - Google Patents
Lighting power-saving measurement and control system based on wireless sensor network Download PDFInfo
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention relates to a lighting power-saving measurement and control system based on a wireless sensor network, which comprises sensor nodes, relay nodes, a gateway and an upper computer, wherein the sensor nodes are used for acquiring and sending data and are also used for configuring the parameters of the sensor nodes and/or corresponding lighting power-saving equipment according to received configuration data; the relay nodes are used for collecting data sent by each sensor node which is in the floor and is located in the range that relay node signals cover, or are used for carrying out relaying transmission on data from other relay nodes and directly sending the data to the gateway or sending the data to the gateway in manner of multihop and are also used for sending the configuration data from the gateway to the corresponding sensor nodes; the gateway is used for collecting the data of the whole network and sending the data to the upper computer through a serial port and is also used for receiving the configuration data from the upper computer and directly transmitting the configuration data to the corresponding sensor nodes or transmitting the configuration data to the corresponding sensor nodes through the corresponding relay nodes in manner of multihop; the upper computer is used for receiving the data uploaded by the gateway and saving the data to a data base, sending the configuration data to the gateway through the serial port and indicating the sensor node which corresponds to the configuration data.
Description
Technical field
The present invention relates to the illuminating energy-saving field, and a kind of lighting power-saving measurement and control system based on wireless sensor network especially is provided.
Background technology
Show according to a large amount of experiment statistics results, the every reduction by 10% of supply voltage, conventional light fixture such as fluorescent lamp illuminance reduce by 7% approximately, and human eye becomes logarithmic relationship to the sensation of light with illumination, promptly when light illumination reduced 10%, people's visual sense feeling brightness only reduced 1% in theory, therefore suitably reduced the faint variation of illumination that the light fixture input power is produced, can not influence normal use, but lamp life can prolong 70%.The power consumption in the whole world 20% is in illumination, and China's electric consumption on lighting amount with about 15% speed increase, reached 3,900 hundred million kilowatt hours in 2007 every year on average, and the proportion that accounts for national electricity consumption total amount surpasses 12%.So next energy-conservation by suitable step-down, also can produce huge economic and social benefit.
The input of illuminating energy-saving equipment, main aspect are the transformations to existing lighting installation.No matter be street illumination, or office lighting, these illuminating engineerings and light current circuit majority all are the bulky systems that has completed, and must be conceived to transform so promote illuminating energy-saving equipment.The input of while electric consumption on lighting, always be positioned in the position that is difficult for the exposed population group, in these positions illuminating energy-saving equipment is installed, perhaps installing laggard line parameter setting all is difficult for, this just requires the mounting means of illuminating energy-saving equipment simple, reliable, and carry out the parameter setting by wireless mode.
Numerous practices show, lighting energy saving is a system engineering, carry out reducing energy consumption at single equipment, it is little often to produce effects, if each object centralized control of lighting mains can be got up, the subregion, divide season, at times, at different lighting sources, at different load capacities, adopt different allocation plans just can receive good effect.
Wireless sensor network is current receive much concern in the world, relate to multidisciplinary height intersection, the integrated hot research field, forward position of knowledge height.It combines sensor technology, embedded computing technique, modern network and wireless communication technology, distributed information processing etc., can be by all kinds of integrated microsensors information of the various environment of monitoring in real time, perception and collection or monitoring target collaboratively, these information are sent out by wireless mode, and are sent to user terminal with the network mode of organizing multi-hop certainly.Use wireless sensor network separate equipment effectively can be organized, thereby obtain the perceptual organization of an intelligence, remove to manage each object from the aspect of system.
The major loop of illuminating energy-saving equipment is realized energy-conservation by the input voltage that reduces lighting loop.Its principle as shown in Figure 1, control circuit will periodically be gathered lighting mains input voltage, illuminating energy-saving equipment output voltage and load current among Fig. 1, and core temperature.Control circuit is by these negative feedbacks, and the open circuit of control relay and closure are controlled the access (sealing in lighting mains) of illuminating energy-saving equipment and disconnected (bypass goes out lighting mains).
Summary of the invention
The objective of the invention is to design a kind of lighting power-saving measurement and control system based on wireless sensor network, whole system does not need to lay the dedicated data transmission circuit, image data periodically, by wireless mode, low-cost and low complex degree ground realization is to the centralized monitor of the energy-saving device that throws light on.
In order to address the above problem, the invention provides a kind of lighting power-saving measurement and control system, it is characterized in that, comprising:
The plurality of sensors node is corresponding one by one with illuminating energy-saving equipment; Several via nodes, gateway and host computer;
Each described sensor node is respectively applied for core temperature, lighting mains input voltage, illuminating energy-saving equipment output voltage and the load current of gathering pairing illuminating energy-saving equipment major loop, sends the data of being gathered; Also be used to receive configuration data, and dispose the parameter of this sensor node and/or pairing illuminating energy-saving equipment according to this configuration data;
Each described via node is used to collect the data that This floor is interior, be in each sensor node transmission in this via node signal cover; Perhaps be used for the data that relay transmission comes from other via nodes, direct or multi-hop sends to described gateway; Also be used for the configuration data from gateway is sent to the corresponding sensor node;
Described gateway is used to compile the data of whole network, and sends to host computer by serial ports; Also be used to receive configuration data, directly or by corresponding relay node multi-hop be transferred to corresponding sensor node from host computer;
Described host computer is used to receive the Monitoring Data that gateway uploads and preserves database, also is used for by serial ports configuration data being sent to described gateway, and indicates this configuration data corresponding sensor node.
Further, described system also comprises:
Each described sensor node also sends the node identification of this node when sending the data of being gathered, and this sensor node is with the indication of the received signal intensity between father node RSSI information;
Described host computer is indicated this configuration data corresponding sensor node by carry the node identification of the pairing sensor node of this configuration data in described configuration data.
Further, each described sensor node periodic duty;
Each described via node also is used for buffer memory and comes from configuration data gateway, that send to the sensor node in this via node signal cover, inquire after the state of this configuration data corresponding sensor node, after described corresponding sensor node is waken up, described configuration data is sent to this corresponding sensor node.
Further, described via node comprises key via node and common via node; At each floor gap a key via node is installed respectively, the data that the sensor node of This floor and common via node are sent are compiled and are transferred to gateway, and the data forwarding that will send from gateway key via node far away is to gateway or from the nearer key via node of gateway.
Further, described host computer is preserved node identification, floor number and the installation site information of each sensor node; Also be used for determining the concrete installation site of sensor node by node identification.
Further, described sensor node specifically comprises:
Temperature sensor, the core temperature that is used to gather pairing illuminating energy-saving equipment major loop;
The current acquisition module is used to gather load current;
Voltage acquisition module is used to gather lighting mains voltage, illuminating energy-saving equipment output voltage;
The data interaction module is used to send the data of described temperature sensor, current acquisition module and voltage acquisition module collection to father node; And reception comes from the configuration data of father node;
Controller is used for disposing according to configuration data the parameter of this sensor node and/or pairing illuminating energy-saving equipment;
Described temperature sensor, current acquisition module, voltage acquisition module and data interaction module can be in resting state at ordinary times; Described controller also is used for the described temperature sensor of timing wake-up, current acquisition module, voltage acquisition module and data interaction module; Described temperature sensor, current acquisition module and voltage acquisition module are waken up the back image data, and then enter resting state; Described data interaction module is waken up the back and sends the data gathered, if configuration data is arranged then receive, enters resting state after finishing once more.
Further, described system also comprises:
Memory module is used to preserve an operation interval parameter;
Controller also is used for regularly judging according to real-time clock signal whether the current time belong to operation interval, if belong to then the lighting energy saving major loop is connected in series to lighting loop; Otherwise the lighting energy saving major loop is switched to bypass condition.
Further, described system also comprises:
Memory module is used to preserve voltage threshold, load threshold and temperature threshold;
Controller also is used for when one or more of following situation take place, and sensor node switches to bypass condition with the lighting energy saving major loop:
The core temperature of the pairing illuminating energy-saving equipment major loop that collects is greater than described temperature threshold;
The lighting mains input voltage that collects is less than described voltage threshold;
The load current that collects is greater than described load threshold.
Further, described system also comprises:
Memory module, the node ID that is used to preserve this sensor node, and the RSSI information between this sensor node and the father node;
When described data interaction module sent the data of being gathered, the node identification, this sensor node that carry this sensor node therein were with the RSSI information between the father node.
Further, described system also comprises:
Described controller also is used for regularly indicating described data interaction module to determine network state;
Be waken up after described data interaction module is received this indication, send described broadcast packet with definite current father node, and RSSI information, and be kept in the described memory module.
The present invention is used for wireless sensor network technology the management of illumination power saving system, overcome the difficulty that is difficult to image data under traditional cable data acquisition mode installation and maintenance cost height, the adverse circumstances, utilize wireless communication technology and embedded technology, realized that a kind of maintenance cost is low, easy for installation, operating aspect, wireless widely centralized control conforms.
Description of drawings
Fig. 1 is the principle schematic of illuminating energy-saving equipment;
Fig. 2 is the topological structure schematic diagram of the lighting power-saving measurement and control system among the embodiment one.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Embodiment one, and a kind of lighting power-saving measurement and control system as shown in Figure 2, comprising:
The plurality of sensors node is corresponding one by one with illuminating energy-saving equipment; Several via nodes, gateway and host computer; Among Fig. 2, having 3 floors, is respectively floor A, B, C; Wherein floor A is a gateway place floor, comprises three sensor nodes and a via node, the direct and gateway wireless connections of one of them sensor node, two other sensor node and via node wireless connections; The via node that two wireless connections are arranged among the floor B, one of them via node links to each other with gateway, also have two sensor nodes in addition, in two sensor nodes one with these via node wireless connections, another via node wireless connections among another and the floor B; A via node is arranged among the floor C,, also has two sensor nodes with the via node wireless connections that link to each other with gateway among the floor B, all with this floor C in the via node wireless connections.Fig. 2 is an application examples only, during practical application, and layout according to demand.
Each described sensor node is respectively applied for core temperature, lighting mains input voltage, illuminating energy-saving equipment output voltage and the load current of gathering pairing illuminating energy-saving equipment major loop, node ID with the data of being gathered and this sensor node, and this sensor node sends together with the RSSI between the father node (Received Signal Strength Indicator, the indication of received signal intensity) information; Also be used to receive configuration data, and dispose the parameter of this sensor node and/or pairing illuminating energy-saving equipment according to this configuration data.
Described father node is on the transmission path between sensor node and the described gateway, generally is the node of close sensor node, just with the node of the direct communication of sensor node; Might be a via node, also may be described gateway.
In the present embodiment, the packet that sensor node is uploaded to gateway all comprises RSSI information, what this information characterized is sensor node and his father's data between nodes transmission quality, if RSSI information shows that then the user can consider to increase in position via node a little less than the communication between this sensor node and father node.After this newly-increased via node worked on power, sensor node can detect its existence voluntarily, and nullified the routing relation of oneself on former father node, signed in to then on the new via node.In order to finish this function, on sensor node, designed the periodically mechanism of detection signal quality.Every 10 minutes, sensor node can send a broadcast packet and detect via node or gateway on every side, receives that the via node of this information or gateway can be to this sensor node return informations.The node (via node or gateway) that sensor node is always preferentially preserved the fastest answer be a father node, and the RSSI information between preservation and this father node.
In order to economize on electricity, each described sensor node periodic duty can be set, that is: generally be in resting state, regularly wake up and gather and send data; If receive configuration data then carry out corresponding configuration, and then enter resting state.
Each described via node is used to collect the data that This floor is interior, be in each sensor node transmission in this via node signal cover; Perhaps be used for the data that relay transmission comes from other via nodes, direct or multi-hop sends to described gateway; Via node also is used for buffer memory and comes from configuration data gateway, that send to the sensor node (child node) in this via node signal cover, inquire after the state of this configuration data corresponding sensor node, after described corresponding sensor node is waken up, described configuration data is sent to this corresponding sensor node (child node).
Each described via node needs externally fed, does not have the pattern of dormancy, and the topological relation that it can maintaining network is that subordinate's sensor node is created the tabulation of child node topology.
Described via node comprises key via node and common via node; In the present embodiment, the shielding ratio of considering floor and floor gap is more remarkable, so a key via node respectively is installed at each floor gap, the data that the sensor node of This floor and common via node are sent are compiled and are transferred to gateway, and the data forwarding that will send from gateway key via node far away is to gateway or from the nearer key via node of gateway.Link has so layer by layer just constituted a key passage that data are compiled and transmitted.Gateway place floor does not need to increase key via node equipment especially and comes aggregated data.
Described gateway is used to compile the data of whole network, and sends to host computer by serial ports; Also be used to receive configuration data, be transferred to the corresponding sensor node from host computer; Can also can directly be transferred to sensor node by the transmission of corresponding relay node multi-hop.
The data that are pooled to gateway are divided into two kinds, and a kind of is the data of coming by key via node transmission, and another kind is the data of directly being come by the sensor node transmission.
Described host computer is used to preserve node ID (sign), floor number and the installation site information of each sensor node; The Monitoring Data that the reception gateway is uploaded also preserves database; Also be used for configuration data being sent to described gateway by serial ports, and indicate this configuration data corresponding sensor node, such as the node ID of carrying the pairing sensor node of this configuration data in configuration data, gateway and via node can be differentiated configuration data according to this will send to for which sensor node.Can give tacit consent to when not carrying node ID, configuration data is to send to all the sensors node; In addition version number can also be set in configuration data, sensor node can be compared with the version of the local configuration data of preserving earlier after receiving configuration information, the configuration data that find to receive when new, upgrades the local configuration data preserved with the configuration data that receives than local.
In the present embodiment, when each sensor node was installed, just node ID, floor number and the installation site information with each sensor node was kept in the host computer; Described host computer can but be not limited to a monitoring central server.
In the present embodiment, described host computer can be according to node ID, floor number and the installation site information of each sensor node of being preserved, determine the concrete installation site of sensor node by node ID, thereby can correspond to the concrete physical location in the building, thereby the monitor staff can be controlled and Query Running Status according to the relevant information in the host computer to each illuminating energy-saving equipment.
In the present embodiment, in the sensor node course of work, need periodically relatively current time and the operation interval parameter of being preserved,, then start energy saver mode, the lighting energy saving major loop is connected in series to lighting loop if the current time belongs to operation interval.Otherwise sensor node switches to bypass condition with the lighting energy saving major loop, is directly powered by lighting mains, and corresponding light fixture is operated under the total head state.
In the present embodiment, illuminating energy-saving equipment subregion work, at sunshine condition Administrative Area preferably, the lighting operating time is shorter, and the time of corresponding illuminating energy-saving equipment work is just shorter.Illuminating energy-saving equipment is worked at times, and the working hour that is on duty, personnel are busy, and illuminating energy-saving equipment is not worked.Illuminating energy-saving divides seasonal work, and is general, and the hours of daylight in summer is long, and the time of illuminating energy-saving equipment work is just shorter.
Therefore, corresponding to the operation interval parameter difference in the sensor node of different illuminating energy-saving equipment, according to the situation setting of illuminating energy-saving equipment region.
In the present embodiment, in the illuminating energy-saving equipment work process, 3 class faults can appear: under-voltage, overload and overtemperature.Under-voltage is that line voltage can not satisfy the needs of lighting because the input voltage of illuminating energy-saving equipment is low excessively, and step-down this moment is energy-conservation nonsensical; Overload is to cause because lighting loop is unusual to occur big electric current in the loop; Overtemperature causes because of overload of illuminating energy-saving major loop or radiating condition reduction.At these several faults, settling mode all is to force the bypass of lighting energy saving major loop to go out lighting mains, is directly powered to light fixture by electrical network.
Preserve voltage threshold, load threshold and temperature threshold in the described sensor node, during in following situation takes place one or more, sensor node switches to bypass condition with the lighting energy saving major loop:
The core temperature of the pairing illuminating energy-saving equipment major loop that collects is greater than described temperature threshold;
The lighting mains input voltage that collects is less than described voltage threshold;
The load current that collects is greater than described load threshold.
In the present embodiment, sensor node is preserved corresponding illuminating energy-saving apparatus operating parameters, and the posterior nodal point that powers on is controlled the illuminating energy-saving major loop voluntarily and dropped into energy-conservation or bypass.Even do not having under the situation of network, sensor node also can guidance lighting energy-saving device operate as normal.
In the present embodiment, sensor node ID can but be not limited to 64, illuminating energy-saving equipment is installed in the different corners of each floor, and each illuminating energy-saving equipment all has a unique ID number, and the node ID of each sensor node can be consistent with the illuminating energy-saving equipment of correspondence; Because sensor node and illuminating energy-saving equipment are one to one, therefore what illuminating energy-saving equipment are arranged, just need to install what sensor nodes.
In the present embodiment, described sensor node specifically can comprise:
Temperature sensor, the core temperature that is used to gather pairing illuminating energy-saving equipment major loop;
The current acquisition module is used to gather load current;
Voltage acquisition module is used to gather lighting mains voltage, illuminating energy-saving equipment output voltage;
The data interaction module is used to send data that described temperature sensor, current acquisition module and voltage acquisition module gather to father node, and the node ID, this sensor node of carrying this sensor node therein are with the RSSI information between the father node; And reception comes from the configuration data of father node; And send a broadcast packet, and the node (via node or gateway) of the fastest answer is defined as father node, and preserve and this father node between RSSI information;
Memory is used to preserve RSSI information, operation interval parameter, voltage threshold, load threshold and temperature threshold between node ID, this sensor node and the father node of this sensor node;
Controller is used for disposing according to configuration data the parameter of this sensor node and/or pairing illuminating energy-saving equipment; And be used for regularly judging according to real-time clock signal whether the current time belong to operation interval, if belong to then the lighting energy saving major loop be connected in series to lighting loop; Otherwise the lighting energy saving major loop is switched to bypass condition; And judge the lighting loop that the lighting energy saving major loop is switched to bypass or series connection according to data and voltage threshold, load threshold and the temperature threshold of described temperature sensor, current acquisition module and voltage acquisition module collection.Described real-time clock signal is calibrated by upper computer software.
Described temperature sensor, current acquisition module, voltage acquisition module and data interaction module can be in resting state at ordinary times; Described controller also is used for the described temperature sensor of timing wake-up, current acquisition module, voltage acquisition module and data interaction module; Described temperature sensor, current acquisition module and voltage acquisition module are waken up the back image data, and then enter resting state; Described data interaction module is waken up the back and sends the data gathered, if configuration data is arranged then receive, enters resting state after finishing once more; Thereby can make sensor node reach power saving effect.
Described controller also is used for regularly indicating described data interaction module to determine network state;
Be waken up after described data interaction module is received this indication, send described broadcast packet with definite current father node, and RSSI information, and be kept in the described memory module.
In the present embodiment, described controller woke once described temperature sensor, current acquisition module, voltage acquisition module and data interaction module up every 60 seconds, and the designation data interactive module determined that network state once in per 10 minutes; Can adjust the length of these times during practical application as required.
In the present embodiment, comprise the input voltage of illuminating energy-saving equipment in the data that sensor node sends, output voltage, load current, core temperature.Be uploaded to gateway these cycle datas, and write database by upper computer software.By the real time data inquiry, the user can the current working condition of monitoring light energy-saving device.By the inquiry of historical data, the user can obtain the long-term work situation of illuminating energy-saving equipment.According to these information, as the loading condition of illuminating energy-saving equipment, the heating situation, the user can scientifically adjust the illuminating energy-saving apparatus operating parameters.The historical data of monitoring voltage also can provide early warning to the hidden danger that lighting circuit exists simultaneously.
In the present embodiment, each described sensor node needs externally fed, is in the web search state after powering on; Each via node also needs externally fed, does not have resting state, also is in the web search state after powering on.In the present embodiment, the network that gateway is set up can but be not limited to 2.4G, full Mesh self-organizing network.
In the present embodiment, there is and only has a gateway, after gateway is connected host computer, promptly can set up a network, after network was set up, each via node can find this network and add this network, constituted the network of self-organizing, each sensor node is then found this network after withdrawing from resting state, and adds this network by via node nearby.Promptly finished the foundation of the self-organizing network of described lighting power-saving measurement and control system this moment.So just finished with sensor node the process of via node and gateway production data acquisition bunch; With gateway is a bunch head, and bunch interior nodes is carried out the process of collisionless transfer of data to bunch head; Bunch head carries out the process of man-to-man transfer of data to bunch interior nodes; After network is set up, rely on a spot of via node and gateway to maintain the network topology relation, the mechanism of the intermittent dormancy of sensor node.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (10)
1. a lighting power-saving measurement and control system is characterized in that, comprising:
The plurality of sensors node is corresponding one by one with illuminating energy-saving equipment; Several via nodes, gateway and host computer;
Each described sensor node is respectively applied for core temperature, lighting mains input voltage, illuminating energy-saving equipment output voltage and the load current of gathering pairing illuminating energy-saving equipment major loop, sends the data of being gathered; Also be used to receive configuration data, and dispose the parameter of this sensor node and/or pairing illuminating energy-saving equipment according to this configuration data;
Each described via node is used to collect the data that This floor is interior, be in each sensor node transmission in this via node signal cover; Perhaps be used for the data that relay transmission comes from other via nodes, direct or multi-hop sends to described gateway; Also be used for the configuration data from gateway is sent to the corresponding sensor node;
Described gateway is used to compile the data of whole network, and sends to host computer by serial ports; Also be used to receive configuration data, directly or by corresponding relay node multi-hop be transferred to corresponding sensor node from host computer;
Described host computer is used to receive the Monitoring Data that gateway uploads and preserves database, also is used for by serial ports configuration data being sent to described gateway, and indicates this configuration data corresponding sensor node.
2. the system as claimed in claim 1 is characterized in that, also comprises:
Each described sensor node also sends the node identification of this node when sending the data of being gathered, and this sensor node is with the indication of the received signal intensity between father node RSSI information;
Described host computer is indicated this configuration data corresponding sensor node by carry the node identification of the pairing sensor node of this configuration data in described configuration data.
3. the system as claimed in claim 1 is characterized in that:
Each described sensor node periodic duty;
Each described via node also is used for buffer memory and comes from configuration data gateway, that send to the sensor node in this via node signal cover, inquire after the state of this configuration data corresponding sensor node, after described corresponding sensor node is waken up, described configuration data is sent to this corresponding sensor node.
4. the system as claimed in claim 1 is characterized in that:
Described via node comprises key via node and common via node; At each floor gap a key via node is installed respectively, the data that the sensor node of This floor and common via node are sent are compiled and are transferred to gateway, and the data forwarding that will send from gateway key via node far away is to gateway or from the nearer key via node of gateway.
5. the system as claimed in claim 1 is characterized in that:
Described host computer is preserved node identification, floor number and the installation site information of each sensor node; Also be used for determining the concrete installation site of sensor node by node identification.
6. as each described system in the claim 1 to 5, it is characterized in that described sensor node specifically comprises:
Temperature sensor, the core temperature that is used to gather pairing illuminating energy-saving equipment major loop;
The current acquisition module is used to gather load current;
Voltage acquisition module is used to gather lighting mains voltage, illuminating energy-saving equipment output voltage;
The data interaction module is used to send the data of described temperature sensor, current acquisition module and voltage acquisition module collection to father node; And reception comes from the configuration data of father node;
Controller is used for disposing according to configuration data the parameter of this sensor node and/or pairing illuminating energy-saving equipment;
Described temperature sensor, current acquisition module, voltage acquisition module and data interaction module can be in resting state at ordinary times; Described controller also is used for the described temperature sensor of timing wake-up, current acquisition module, voltage acquisition module and data interaction module; Described temperature sensor, current acquisition module and voltage acquisition module are waken up the back image data, and then enter resting state; Described data interaction module is waken up the back and sends the data gathered, if configuration data is arranged then receive, enters resting state after finishing once more.
7. system as claimed in claim 6 is characterized in that, also comprises:
Memory module is used to preserve an operation interval parameter;
Controller also is used for regularly judging according to real-time clock signal whether the current time belong to operation interval, if belong to then the lighting energy saving major loop is connected in series to lighting loop; Otherwise the lighting energy saving major loop is switched to bypass condition.
8. system as claimed in claim 6 is characterized in that, also comprises:
Memory module is used to preserve voltage threshold, load threshold and temperature threshold;
Controller also is used for when one or more of following situation take place, and sensor node switches to bypass condition with the lighting energy saving major loop:
The core temperature of the pairing illuminating energy-saving equipment major loop that collects is greater than described temperature threshold;
The lighting mains input voltage that collects is less than described voltage threshold;
The load current that collects is greater than described load threshold.
9. system as claimed in claim 6 is characterized in that, also comprises:
Memory module, the node ID that is used to preserve this sensor node, and the RSSI information between this sensor node and the father node;
When described data interaction module sent the data of being gathered, the node identification, this sensor node that carry this sensor node therein were with the RSSI information between the father node.
10. system as claimed in claim 9 is characterized in that, also comprises:
Described controller also is used for regularly indicating described data interaction module to determine network state;
Be waken up after described data interaction module is received this indication, send described broadcast packet with definite current father node, and RSSI information, and be kept in the described memory module.
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